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<script>
    // 题目4: 写一个函数 parseQueryString，
    // 它的用途是把 URL 参数解析为一个对象

    // 例如：parseQueryString("admin=user&pass=1234") 
    // 返回 {admin:"user",pass:"1234"}

    function parseQueryString(URL) {
        let arr1 = URL.split("&");
        let obj = {};

        for (let i = 0; i < arr1.length; i++) {
            let arr2 = arr1[i].split("=")
            obj[arr2[0]] = arr2[1];
        }
        return obj
    }

    console.log(parseQueryString("admin=user&pass=1234"));
</script>